<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
    <div id="box">
        <navbar>
            <button @click="isShow=!isShow">click</button>
        </navbar>
        <sidebar v-show="isShow"></sidebar>
    </div>

    <script type="text/javascript">
    Vue.component("navbar", {
        template:`
        <div style="background:yellow;">
            导航栏  <slot></slot>
        `, 
    })

    Vue.component("sidebar",{
        template:`
        <div style="background:red; width: 200px;">
            <ul>
                <li>好友</li>
                <li>设置</li>
                <li>退出</li>
            </ul>
        </div>
            `
        })

        new Vue ({
            el: "#box",
            data: {
                isShow: false
            },
            methods:{
            }
        })

    </script>
</body>
</html>